﻿// 顶级语句 一个项目中只能有一个文件

using _075.新语法;

Console.WriteLine("Hello, World!");

A();

void A()
{
	Console.WriteLine("可以设置方法");
}

// 可空引用类型
int? a = null;
Console.WriteLine(a);

Student s1 = GetData();
Console.WriteLine(s1.Name);
if (s1.PhoneNum != null)
{
}



static Student GetData()
{
	Student student = new Student("fzn");
	return student;
}
